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J A. BRAUTIGAM. Button Hole Sewing Machine. No. 241,918. Patented May24, 1881.

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ATTORNEY a. mans. W W 0. a

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J; A. BRAUTIGAM. Button Hole Sewing Machine. No. 241,918. Patented May24, I881.

ATTORNEY N. Paella. mm M1 UNITED STATES PATENT OFFICE.

JOSEPH A. BRAUTIGAM, OENEW YORK, N. Y., ASSIGNOR TO HIMSELF AND F. G.JANNSOH, OF SAME PLACE.

BUTTON-HOLE SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 241,918, dated May 24,1881.

Application filed August 6, 1880. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH A. BRAUTIGAM, of the city, county, and Stateof New York, have invented certain new and useful Improvements inButton-Hole Sewing-Machines, of which the following is a specification.

The object of this invention is to furnish for tailors, manufacturers ofclothing, and for family use an improved sewing-machine which canbe'used as a common sewing-machine and for sewing button-holes, and inwhich the stitch can be altered while the machine is at work from aregular lock-stitch to a zigzag buttonhole or embroidery stitch.

The invention consists of the combination, with the reciprocatingneedle-bar, of an adj ustable cam-disk applied to and operated by anauxiliary shaft by which the needle-bar and its guide-plate arelaterally oscillated simultaneously with their vertically-reciprocatin gmotion, so as to accomplish, in connection with a slot of theneedle-plate, button-hole stitching. The width of the stitch can beregulated by adjusting the cam-disk on the'end of the auxiliary shaft bymeans of a sleeve and set-screw. The button-hole is guided for laying onthe stitches by a vertical pin, which is passed through a hole of theneedle-plate by a slidepiece and returned below the same on thewithdrawal of the slide-piece.

In the accompanying drawings, which fully illustrate my invention,Figure 1 represents a side elevation of a sewing-machine provided withmy improvements, partly in section through the operating parts. Fig. 2is a top view of part of the table, the work-plate, and the needle-plateof the machine; and Figs. 3 and 4 are respectively a detail end view ofthe needle-bar and its actuating cam-disk and a detail horizontalsection of the same on line :0 a, Fig. 3, the auxiliary shaft andthumb-screw being shown in elevation.

Similar letters of reference indicate corre sponding parts.

In the drawings, A represents the main shaft of my improved button-holesewing-machine; B, the vertically-reciprocatin g needle-bar of the same,and O a recessed guide-plate, which is pivoted to the upper part of theguidecasing D at the end of the supporting-arm D of the sewing-machine.The needle-bar B receives its vertically-reciprocating motion from themam shaft A by an intermediate crankdisk and transverse slottedguide-piece, or

otherwise, and moves along a recessed guideplate, 0, to which a lateral]y-oscillatin g motion is imparted by a cam-disk, E, at the end of anauxiliary shaft, E, which latter is arranged parallel to the main shaftA, and supported in bearings of the main arm D and easing D Theauxiliary shaft E and cam-disk E receive rotary motion by atransmitting-gearing, a a, from the main shaft A, the cam-disk engagingby a projecting cam, 11, of segmental shape, the guide-plate O of theneedle-bar B, so that an oscillating motion is imparted to the samesimultaneously with the reciprocating motion which it receives from themain shaft A. The guide-plate of the needle-bar is thrown inward by saidcam, and as soon as released therefrom is pressed outward by means of aspiral spring, d, which is interposed between the lower end oftheguideplateC and the casing D, as shown in Fig. 1. The cam-disk E is connectedto the end of the auxiliary shaft E by a sleeve, e, which is guided by aside recess on a projecting stud, e. The cam-disk E is adjusted on theend of the auxiliary shaft by a thumbscrew, e which bears on the outerface of the cam-disk and screws into a hole in the center of the end ofthe auxiliary shaft E, so as to vary the laterally-oscillating motion orthrow of the needle-bar B.

A spiral spring, f, is interposed between a collar, f, of the auxiliaryshaft E and the sleeve of the cam-disk E, so that on loosening theadjusting thumb-screw the cam -disk is moved outward on the auxiliaryshaft until the cam 11 clears the guide-plate of the needle-bar. By thethumb-screw e which projects beyond the face-plate of the casing D andthe spiral spring f, the cam-disk E is readily adjusted on the end ofthe auxiliary shaft E, and thereby the stitch may be changed from acommon lock-stitch to a variable embroidery stitch during the working ofthe machine.

The needle-plate F of the sewing-machine is attached to the bed-plate I,and is provided with a lateral slot, g,which is of sufficientlength evenfor the extremest side motion which the cam-disk can impart to theneedle-bar.

For the purpose of guiding the button-hole to the needle in stitchingalong the sides and around the ends of the same, aguide-pin, G, isprovided, which is thrown up through a pert'oration ot' the needle-plateF, it being guided by a bracket below the needle-plate. The guide-pin Gis engaged at its lower enlarged end or head by a laterally-guidedslide-piece, H, which is taken hold of at its outer end by the left handand pushed in or out, so as either to lift the guidepin through theneedle-plate or withdraw it to a level with the same, the latter motionbeing assisted by a spiral spring, It, interposed between the bracket 11and the head of the pin, as shown in Fig. 1.

The sewing-machine may he used iuthe usual manner as a commonsewing-machine by unscrewing the adjusting thumb-screw of the canrdisl;to such an extent that the cam exerts no influence upon the oscillatingguide-plate of the needle-bar, in which case the buttonhole attachmentis entirely thrown out of use. By moving the cam-disk inwardly orturning the thumbserew the cam of the disk engages the guideplate oi'the needle-bar to a greater or less extent, so as to give the same alarger orsmallerlateral throw for forming the button hole stitches, inwhich case the face-gimp is supplied in the usual manner by means of ahole and guidegrom e of the needleplate, as shown in Fig. 2.

The machine may he changed with great facility from a commonsewinganachine to a button-hole sewing-machine, the change beingaccomplished by a very simple mechanism, which is superior to thecomplicated attach ments or special machines heretofore constructed forthis purpose.

Having thusdescrihed my invention, 1 claim asnew and desire to secure byLetters Patent- 1. In a sewing-machine, the combination, with the mainshaft and the vertically-reciprocating needle-bar ll, of the oscillatingvertical guide-plate (J, for carrying the needle-bar, the spring (I, andthe rotary disk 1), operating in direct contact with the verticalguide-plate of 5 it. in a sewing-machine, the combination 01' theauxiliary shaft E, having guide-stud c, with a cam-disk, E, having arecessed guidesleeve, c and the springf, all substantially as described4. In a sewing-machine, the combination, with the bed-plate I andthroat-plate F, of a vertical guide-pin, (l, a laterally-guidedslidepieee, ll, t'orlit'ting the pin, and a spring for depressing thesame, substantially as described.

In testimony that I claim the foregoing as my invention 1 have signed myname, in presence of two witnesses, this 4th dayoi' August, 1880.

JOSEPH A. BRA UT IGrUtL Witnesses:

Frmmcmcn' G, JANNSCII, PAUL (tonricL.

